Despite the fact that they're all owned by Facebook, if you compare the frequency with which Instagram and Facebook Messenger add new features to WhatsApp, well, the latter doesn't fare well at all. That said, today might be the day when WhatsApp starts trying to get with the times in this regard. Its iOS app has received an update that brings three new features with it. First off, when you share four or more photos or videos they will be automatically grouped together in an album. This...